Battery detection system and battery detection method

Abstract

The invention discloses a battery detection system and a battery detection method. The battery detection system comprises a rack, a lifting assembly, a laser assembly, a mobile scanning assembly and a control assembly. The lifting assembly is arranged on the rack and is configured to be used for placing and lifting a battery; the laser assembly is arranged on one side of the rack and is used for emitting detection laser to the battery; the mobile scanning assembly is arranged on one side of the lifting assembly and can move in the horizontal direction. The mobile scanning assembly is configured to receive the detection laser and emit the detection laser to the battery, and the battery is irradiated by the detection laser to generate vibration; the control assembly is arranged on the rack and used for controlling work of the lifting assembly, the laser assembly and the movable scanning assembly and can process vibration into a scanning image. The laser assembly and the mobile scanning assembly of the battery detection system can improve the scanning rate and the detection precision. And the scanning gap can realize non-contact scanning of the battery. The battery detection method can improve the battery detection efficiency and accuracy.

Description

Technical Field

[0001] The present invention belongs to the technical field of batteries, and in particular relates to a battery detection system and a battery detection method. Background Art

[0002] As a stable and reliable electrochemical energy storage device, lithium batteries are widely used in electronic products, new energy vehicles and energy storage fields. Whether the electrolyte in the lithium battery is evenly diffused inside the battery and fully infiltrates the active materials and diaphragms is one of the key steps in the lithium battery production process. If the electrolyte is unevenly and insufficiently distributed inside the battery, it may lead to inconsistent local properties of the battery, greatly reduce the overall formation performance, and ultimately cause the entire battery to fail.

[0003] Traditional electrolyte wettability test methods include gravity method, focused ion beam method, contact angle measurement method, electrochemical impedance spectroscopy, ultrasonic scanning technology and machine vision technology. These traditional test methods have poor repeatability, slow detection speed and cannot accurately evaluate the actual in-situ electrolyte wettability. In addition, there are other technologies such as X-ray imaging technology and neutron diffraction technology, but these technologies are rarely used in lithium battery wettability detection due to radiation and high cost.

[0004] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0005] The object of the present invention is to provide a battery detection system, which can improve the detection efficiency and detection accuracy of the battery.

[0006] In order to achieve the above-mentioned purpose, a specific embodiment of the present invention provides a battery detection system, which includes: a frame, a lifting component, a laser component, a mobile scanning component and a control component. The lifting component is arranged on the frame and is configured to place and lift the battery; the laser component is arranged on one side of the frame and is used to emit a detection laser to the battery; the mobile scanning component is arranged on one side of the lifting component and can move in a horizontal direction; the mobile scanning component is configured to receive the detection laser and emit it to the battery, and the battery vibrates when irradiated by the detection laser; the control component is arranged on the frame and is used to control the operation of the lifting component, the laser component and the mobile scanning component, and can process the vibration into a scanned image.

[0007] In one or more embodiments of the present invention, the lifting assembly includes: a load-bearing platform, a plurality of lifters, and a drive motor. The load-bearing platform is configured to carry the battery; a plurality of lifters are disposed at the bottom of the load-bearing platform for lifting the load-bearing platform; and the drive motor is connected to the plurality of lifters for driving the lifters.

[0008] In one or more embodiments of the present invention, a clamping member is disposed on the carrying platform for clamping the battery on the carrying platform.

[0009] In one or more embodiments of the present invention, a plurality of batteries are placed on the carrying platform.

[0010] In one or more embodiments of the present invention, the mobile scanning assembly includes: a guide rail, a moving member, a reflector, and a laser vibrometer. The guide rail is horizontally arranged on one side of the lifting assembly through a fixed frame; the moving member is slidably arranged on the guide rail; the reflector is arranged on the moving member, and the angle of the reflector is configured to reflect the detection laser to the surface of the battery placed on the lifting assembly; the laser vibrometer is arranged opposite to the reflector and connected to the moving member through a connecting bracket, and there is a scanning gap between the laser vibrometer and the reflector for the battery to pass through.

[0011] In one or more embodiments of the present invention, the laser assembly includes: a pulse laser and an optical collimator. The pulse laser is arranged on one side of the fixed frame for emitting the detection laser; the optical collimator is arranged on the other side of the fixed frame relative to the pulse laser and is configured to reflect the detection laser onto the reflector.

[0012] In one or more embodiments of the present invention, the optical collimator comprises: a housing, a first optical mirror, and a second optical mirror. The first optical mirror is disposed at the lower end of the housing, and is used to receive and reflect the detection laser emitted by the pulse laser; the second optical mirror is disposed at the upper end of the housing along the vertical direction of the housing and is located at the same height as the reflector, and is used to receive the detection laser from the first optical mirror and reflect the detection laser to the reflector.

[0013] Another specific embodiment of the present invention provides a battery detection method using a battery detection system, which includes: placing the battery on a supporting platform, and the control component controlling the pulse laser to emit a detection laser of a specific frequency; the optical collimation component reflects the detection laser to the reflector, and reflects the detection laser to the battery; the moving component drives the reflector to move in the horizontal direction along the guide rail to move the detection laser; the supporting platform moves the battery in the vertical direction, and cooperates with the moving component to perform a two-dimensional scan of the battery surface; the laser vibrometer moves synchronously with the reflector and receives the vibration signal generated after the detection laser irradiates the battery, and transmits it to the control component; the control component processes the vibration signal and images it, and performs detection and evaluation on the battery based on the imaging result.

[0014] In one or more embodiments of the present invention, the pulse frequency of the detection laser is between 1 kHz and 20 kHz.

[0015] In one or more embodiments of the present invention, the moving speed of the moving part is between 200 mm / s and 10 m / s; the lifting speed of the supporting platform is between 100 mm / s and 1 m / s.

[0016] Compared with the prior art, the battery detection system of the present invention can realize two-dimensional scanning of the battery plane by setting a lifting component and a mobile scanning component. The laser component and the mobile scanning component can increase the scanning rate of the detection laser and ensure that the detection laser emitted by the laser component can be stably emitted to the battery, thereby improving the scanning rate and detection accuracy of the battery detection system. The lack of contact between the mobile scanning component and the battery can realize contactless scanning of the battery. The battery detection method can improve the efficiency and accuracy of battery detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A schematic diagram of a battery detection system according to an embodiment of the present invention;

[0019] Figure 2 FIG. 4 is a schematic diagram of an optical collimator according to an embodiment of the present invention.

[0020] Description of main reference numerals:

[0021] 1-frame, 2-lifting assembly, 21-carrying platform, 22-lifter, 23-drive motor, 3-laser assembly, 31-pulse laser, 32-optical collimation component, 321-housing, 322-first optical mirror, 323-second optical mirror, 4-mobile scanning assembly, 41-guide rail, 42-fixed frame, 43-moving part, 44-reflector, 45-laser vibrometer, 46-connecting bracket, 5-control assembly, 6-battery. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0023] like Figure 1 As shown, a battery detection system in one embodiment of the present invention includes a frame 1, a lifting component 2, a laser component 3, a mobile scanning component 4 and a control component 5. The lifting component 2 is arranged on the frame 1, and is configured to place and lift the battery 6. The laser component 3 is arranged on one side of the frame 1, and is used to emit a detection laser to the battery 6. The mobile scanning component 4 is arranged on one side of the lifting component 2 and can move in a horizontal direction. The mobile scanning component 4 is configured to receive the detection laser and emit it to the battery 6, and the battery 6 vibrates when irradiated by the detection laser. The control component 5 is arranged on the frame 1, and is used to control the operation of the lifting component 2, the laser component 3 and the mobile scanning component 4, and can process the vibration into a scanned image.

[0024] The working principle of the battery detection system is as follows: the battery 6 is placed on the lifting component 2. The laser component 3 emits a detection laser under the control of the control component 5 and is reflected to the mobile scanning component 4. The mobile scanning component 4 irradiates the detection laser onto the battery 6 again and the mobile scanning component 4 can move in the horizontal direction to scan the battery 6 in the horizontal direction. The lifting component 2 moves the battery 6 in the vertical direction so that the mobile scanning component 4 can scan the battery 6 in the vertical direction. The detection laser irradiates the battery 6 so that the battery 6 vibrates, and the mobile scanning component 4 can receive the vibration and transmit the vibration to the control component 5. The control component 5 can process the vibration and output it as a scanned image. In the above embodiment, the battery detection system of the present invention can improve the scanning rate of the mobile scanning component 4 and ensure that the detection laser emitted by the laser component 3 can stably emit to the battery 6 by setting the laser component 3 and the mobile scanning component 4, thereby improving the scanning rate and detection accuracy of the battery detection system.

[0025] In one embodiment, the lifting assembly 2 includes a carrying platform 21, a plurality of lifters 22, and a drive motor 23. The carrying platform 21 is configured to carry a battery 6. A plurality of batteries 6 may be placed on the carrying platform 21 at the same time to improve the detection efficiency. A plurality of lifters 22 are arranged at the bottom of the carrying platform 21 for lifting the carrying platform 21. The drive motor 23 is connected to the plurality of lifters 22 for driving the lifters 22. The lifting assembly 2 can realize scanning of the battery 6 in the vertical direction in the process of driving the battery 6 to move up and down.

[0026] The carrying platform 21 may be provided with a clamping member (not shown in the figure) for clamping the battery 6 placed on the carrying platform 21 to prevent the battery 6 from moving, tilting or falling during the process of moving up and down.

[0027] The lifting assembly 2 combined with the laser assembly 3 can realize the scanning of the battery 6 in the vertical direction. The mobile scanning assembly 4 can realize the scanning of the battery 6 in the horizontal direction. The mobile scanning assembly 4 includes a guide rail 41, a moving part 43, a reflector 44 and a laser vibrometer 45. The guide rail 41 is arranged on one side of the lifting assembly 2 in the horizontal direction through a fixed frame 42. The moving part 43 is slidably arranged on the guide rail 41. The reflector 44 is arranged on the moving part 43, and the angle of the reflector 44 is configured to reflect the detection laser to the surface of the battery 6 placed on the lifting assembly 2. The laser vibrometer 45 is arranged opposite to the reflector 44 and is connected to the moving part 43 through a connecting bracket 46. There is a scanning gap between the laser vibrometer 45 and the reflector 44 for the battery 6 to pass through. The scanning gap can prevent the reflector 44 and the laser vibrometer 45 from contacting the battery 6, thereby realizing contactless scanning of the battery 6.

[0028] The laser assembly 3 is used to emit a detection laser to the mobile scanning assembly 4. The laser assembly 3 includes a pulse laser 31 and an optical collimator 32. The pulse laser 31 is arranged on one side of the fixed frame 42 for emitting the detection laser. The optical collimator 32 is arranged on the other side of the fixed frame 42 relative to the pulse laser 31, and is configured to reflect the detection laser to the reflector 44, and the reflector 44 then reflects the detection laser to the battery 6 to scan the battery 6. Figure 2 As shown, the optical collimator 32 includes a housing 321, a first optical mirror 322, and a second optical mirror 323. The first optical mirror 322 is disposed at the lower end of the housing 321, and is used to receive and reflect the detection laser emitted by the pulse laser 31. The second optical mirror 322 is disposed at the upper end of the housing 321 along the vertical direction of the housing 321 and is located at the same height as the reflector 44, and is used to receive the detection laser from the first optical mirror 322 and reflect the detection laser to the reflector 44.

[0029] The pulse laser 31 emits a detection laser, which is irradiated onto the first optical mirror 322 from the light inlet of the housing 321 of the optical collimator 32. The angle of the first optical mirror 322 is set to reflect the detection laser in the vertical direction to the second optical mirror 323. The angle of the second optical mirror 323 is set to allow the detection laser to be emitted from the light outlet of the housing 321 in the horizontal direction to the reflector 44. The setting of the optical collimator 32 allows the detection laser to always be emitted in the horizontal direction regardless of how the mobile scanning assembly 4 moves.

[0030] Compared with the low efficiency and instability of directly moving the pulse laser 31 or the pulse laser 31 directly irradiating the detection laser onto the battery 6. Through the optical collimator 32, the detection laser can always be emitted in the horizontal direction so that instability will not occur. The reflector 44 can quickly reflect the detection laser onto the battery 6, so that the detection laser can match the moving speed of the moving member 43 to avoid the instability of the detection laser during the movement process, thereby improving the accuracy of the detection laser.

[0031] In summary, the battery detection system of the present invention can realize two-dimensional scanning of the plane of the battery 6 by setting the lifting component 2 and the mobile scanning component 4. The laser component 3 and the mobile scanning component 4 can increase the scanning rate of the detection laser and ensure that the detection laser emitted by the laser component 3 can be stably emitted to the battery 6, thereby improving the scanning rate and detection accuracy of the battery detection system.

[0032] A battery detection method in another embodiment of the present invention includes placing a battery 6 on a carrier platform 21, and a control component 5 controls a pulse laser 31 to emit a detection laser of a specific frequency. The optical collimator 32 reflects the detection laser to the reflector 44, and reflects the detection laser to the battery 6. The moving component 43 drives the reflector to move horizontally along the guide rail 41 to move the detection laser. The carrier platform 21 moves the battery 6 in the vertical direction, and cooperates with the moving component 43 to perform a two-dimensional scan on the surface of the battery 6. The laser vibrometer 45 moves synchronously with the reflector 44 and receives the vibration signal generated after the detection laser irradiates the battery 6, and transmits it to the control component 5. The control component 5 processes the vibration signal and images it, and performs detection and evaluation on the battery 6 based on the imaging result.

[0033] The moving speed of the moving part 43 and the carrying platform 21 determines the scanning speed of the battery 6, and the frequency of the pulse laser 31 determines the scanning space step of the battery 6, which will affect the scanning efficiency and accuracy of the battery 6 detection. Among them, the pulse frequency of the detection laser is between 1kHz-20kHz. The moving speed of the moving part 43 is between 200mm / s-10m / s. The lifting speed of the carrying platform 21 is between 100mm / s-1m / s.

[0034] In summary, the battery detection method of the present invention can improve the efficiency and accuracy of battery detection.

[0035] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0036] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A battery detection system, characterized in that: include: frame; A lifting assembly, disposed on the frame and configured to place and lift the battery; A laser assembly, disposed on one side of the frame, for emitting a detection laser toward the battery; A mobile scanning assembly is arranged on one side of the lifting assembly and can move in a horizontal direction; the mobile scanning assembly is configured to receive the detection laser and emit it to the battery, and the battery vibrates when irradiated by the detection laser; and The control component is arranged on the frame and is used to control the operation of the lifting component, the laser component and the mobile scanning component, and can process the vibration into a scanned image.

2. The battery detection system according to claim 1, characterized in that: The lifting assembly comprises: A carrying platform configured to carry the battery; A plurality of lifters, disposed at the bottom of the carrying platform, for lifting the carrying platform; and A driving motor is connected to the plurality of lifters and is used for driving the lifters.

3. The battery detection system according to claim 2, characterized in that: The carrying platform is provided with a clamping member for clamping the battery on the carrying platform.

4. The battery detection system according to claim 2, characterized in that: A plurality of batteries are placed on the carrying platform.

5. The battery detection system according to claim 1, characterized in that: The mobile scanning component comprises: A guide rail is arranged on one side of the lifting assembly in a horizontal direction through a fixing frame; A moving member, slidably disposed on the guide rail; a reflector disposed on the moving member, wherein the angle of the reflector is configured to reflect the detection laser to a surface of a battery placed on the lifting assembly; and A laser vibrometer is arranged opposite to the reflector and connected to the moving part through a connecting bracket, and a scanning gap is provided between the laser vibrometer and the reflector for the battery to pass through.

6. The battery detection system according to claim 5, characterized in that: The laser assembly comprises: a pulse laser, disposed on one side of the fixing frame, for emitting the detection laser; and The optical collimator is arranged on the other side of the fixing frame relative to the pulse laser and is configured to reflect the detection laser onto the reflecting mirror.

7. The battery detection system according to claim 6, characterized in that: The optical collimator comprises: case; A first optical mirror, disposed at the lower end of the housing, for receiving and reflecting the detection laser emitted by the pulse laser; The second optical mirror is arranged at the upper end of the shell body along the vertical direction of the shell body and is located at the same height as the reflector, and is used for receiving the detection laser from the first optical mirror and reflecting the detection laser to the reflector.

8. A battery detection method using the battery detection system according to any one of claims 1 to 7, characterized in that: include: The battery is placed on the carrying platform, and the control component controls the pulse laser to emit a detection laser of a specific frequency; The optical collimator reflects the detection laser to the reflector and reflects the detection laser to the battery; The moving part drives the reflector to move in the horizontal direction along the guide rail to move the detection laser; The carrying platform moves the battery in the vertical direction and cooperates with the moving part to perform two-dimensional scanning on the battery surface; The laser vibrometer moves synchronously with the reflector and receives the vibration signal generated after the laser irradiates the battery, and transmits it to the control component; The control component processes the vibration signal and generates an image, and performs detection and evaluation of the battery based on the imaging results.

9. The battery detection method according to claim 8, characterized in that: The pulse frequency of the detection laser is between 1kHz and 20kHz.

10. The battery detection method according to claim 8, characterized in that: The moving speed of the moving part is between 200mm / s-10m / s; the lifting speed of the carrying platform is between 100mm / s-1m / s.

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